US8061582B2 - Pipe-joining method and apparatus for producing underwater pipelines, and underwater-pipeline-laying vessel comprising such an apparatus - Google Patents

Pipe-joining method and apparatus for producing underwater pipelines, and underwater-pipeline-laying vessel comprising such an apparatus Download PDF

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Publication number
US8061582B2
US8061582B2 US12/448,194 US44819407A US8061582B2 US 8061582 B2 US8061582 B2 US 8061582B2 US 44819407 A US44819407 A US 44819407A US 8061582 B2 US8061582 B2 US 8061582B2
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Prior art keywords
protective sheet
cutback
extrusion outlet
axis
extruder
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US12/448,194
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US20100065614A1 (en
Inventor
Serafino Cittadini Bellini
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Saipem SpA
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Saipem SpA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
    • B23K37/0533—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor external pipe alignment clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/151—Coating hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/157—Coating linked inserts, e.g. chains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/252—Drive or actuation means; Transmission means; Screw supporting means
    • B29C48/2528—Drive or actuation means for non-plasticising purposes, e.g. dosing unit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/266—Means for allowing relative movements between the apparatus parts, e.g. for twisting the extruded article or for moving the die along a surface to be coated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/303—Extrusion nozzles or dies using dies or die parts movable in a closed circuit, e.g. mounted on movable endless support
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/022—Particular heating or welding methods not otherwise provided for
    • B29C65/028—Particular heating or welding methods not otherwise provided for making use of inherent heat, i.e. the heat for the joining comes from the moulding process of one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1282—Stepped joint cross-sections comprising at least one overlap joint-segment
    • B29C66/12821—Stepped joint cross-sections comprising at least one overlap joint-segment comprising at least two overlap joint-segments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1286—Stepped joint cross-sections comprising at least one bevelled joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
    • B29C66/5326—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/65—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles with a relative motion between the article and the welding tool
    • B29C66/652—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles with a relative motion between the article and the welding tool moving the welding tool around the fixed article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/74—Joining plastics material to non-plastics material
    • B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/74—Joining plastics material to non-plastics material
    • B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
    • B29C66/7428—Transition metals or their alloys
    • B29C66/74283—Iron or alloys of iron, e.g. steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • B29C66/8362—Rollers, cylinders or drums moving relative to and tangentially to the parts to be joined
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
    • F16L1/26—Repairing or joining pipes on or under water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/02—Welded joints
    • F16L13/0254—Welded joints the pipes having an internal or external coating
    • F16L13/0272—Welded joints the pipes having an internal or external coating having an external coating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/18—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings
    • F16L58/181—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings for non-disconnectible pipe joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • B23K2101/10—Pipe-lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • B29C2948/926—Flow or feed rate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92904—Die; Nozzle zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/483—Reactive adhesives, e.g. chemically curing adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/52—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive
    • B29C65/522—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive by spraying, e.g. by flame spraying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/024—Thermal pre-treatments
    • B29C66/0242—Heating, or preheating, e.g. drying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic

Definitions

  • the present invention relates to a pipe-joining method for producing an underwater pipeline.
  • the method according to the present invention comprises welding the facing free ends of two adjacent pipes, aligned along an axis, to form an annular joint portion known as cutback; and applying a protective sheet about the cutback.
  • Underwater pipelines comprise a number of pipes joined to total lengths of hundreds of kilometers.
  • the pipes are of normally 12-meter standard length, and relatively large diameters ranging between 0.2 and 1.5 meters, and each comprise a steel cylinder; a first coating of polymer material to protect the steel pipe; and possibly a second coating of Gunite or cement to weigh down the pipe.
  • the pipes and underwater pipelines do not need and therefore have no second coating.
  • each pipe has no first or second coating.
  • the pipes are joined at on-land installations into multiple-standard-length pipes, as well as on pipeline-laying vessels, on which standard-length or multiple-standard-length pipes are joined to others, in turn already joined to other pipes, to form part of the underwater pipeline.
  • the actual joining operation comprises welding the steel cylinders, normally in a number of weld passes, and bridging the first and, possibly, second coating.
  • Cutback protective coating is known as “field joint coating”, and comprises coating the cutback with three coats to ensure protection and adhesion of the coats to the steel cylinders. More specifically, cutback protective coating comprises heating, e.g. induction heating, the cutback to 250° C.; spraying the cutback with powdered epoxy (FBE—Fusion Bonded Epoxy) resin, which, in contact with the cutback, forms a relatively thin first coat or “primer”; spraying the cutback, on top of the first coat, with a modified copolymer, which acts as adhesive and, in contact with the first coat, forms a relatively thin second coat; applying a third so-called “top coat”; and then bridging the second coating if necessary.
  • FBE Fusion Bonded Epoxy
  • Welding, non-destructive weld testing, and bridging the first and second coating are performed at joining stations equally spaced along the path of the pipes (or of the pipeline being formed, when the pipes are joined to this).
  • the pipes are therefore advanced in steps, and are stopped at each joining station for a length of time determined by the longest operation, which, at present, is that of applying the third or top coat.
  • a method of joining pipes to produce an underwater pipeline comprising welding the facing free ends of two adjacent pipes, aligned along an axis, to define a cutback; and winding a protective sheet about the cutback; the method being characterized in that the protective sheet is extruded close to the cutback.
  • Extruding the protective sheet close to the cutback means it can be applied to the cutback while still in the plastic state and at such a temperature as to achieve improved, relatively fast adhesion to the underlying coats and to the first coating. And the even temperature along the whole of the protective sheet means the whole cutback can be coated with a single protective sheet extruded to a suitable thickness.
  • the present invention also relates to a pipe-joining apparatus for producing underwater pipelines.
  • an apparatus for joining pipes to produce an underwater pipeline comprising at least one welding unit for welding the facing free ends of two adjacent pipes, aligned along an axis, to define a cutback; and a coating unit for winding a protective sheet about the cutback; the apparatus being characterized by comprising an extruder for extruding the protective sheet at a joining station, close to the cutback.
  • the present invention also relates to an underwater-pipeline-laying vessel.
  • a vessel for laying underwater pipelines comprising a pipe-joining apparatus as claimed.
  • FIG. 1 shows a side view, with parts removed for clarity, of a pipeline-laying vessel implementing the pipe-joining method according to the present invention
  • FIGS. 2 and 3 show sections, with parts removed for clarity, of pipes at various joining stages
  • FIGS. 4 to 7 show larger-scale sections, with parts removed for clarity, of pipes at further joining stages
  • FIG. 8 shows a side view, with parts in section and parts removed for clarity, of a pipe-joining apparatus in accordance with the present invention
  • FIG. 9 shows a cross section, with parts in section and parts removed for clarity, along line IX-IX of the FIG. 8 pipe-joining apparatus
  • FIG. 10 shows a larger-scale plan view, with parts removed for clarity, of a component part of the FIG. 9 pipe-joining apparatus.
  • Number 1 in FIG. 1 indicates a pipeline-laying vessel in the process of producing and laying in the sea (SL indicates sea level) an underwater pipeline 2 comprising pipes 3 joined to one another.
  • Vessel 1 comprises hulls 4 ; an above-water tunnel 5 ; a partly above-water, inside ramp 6 ; an underwater outside ramp 7 ; and a work line 10 extending along tunnel 5 and the above-water portion of inside ramp 6 .
  • the partly formed underwater pipeline 2 and pipes 3 ready for joining to it extend along an axis A of work line 10 , which comprises a number of joining stations 11 equally spaced along axis A, and each for performing a given operation, such as welding, non-destructive testing, or bridging a coating.
  • the distance between adjacent joining stations 11 equals the standard length, about 12 meters, of each pipe 3 , or a multiple of the standard length, when joining, along line 10 , multiple-standard-length pipes 3 joined beforehand at on-land installations or off-line on the vessel.
  • each pipe 3 comprises a steel cylinder 12 ; a first coating 13 , normally of polyethylene or polypropylene, contacting and for corrosion proofing steel cylinder 12 ; and a second coating 14 of Gunite or cement for weighing down underwater pipeline 2 .
  • the pipes have no second coating.
  • Each pipe 3 has two opposite free ends 15 (only one shown in FIGS. 2 to 6 ) with no first coating 13 and no second coating 14 ; and first coating 13 has a bevel 16 at each free end 15 .
  • Two consecutive pipes 3 aligned along axis A ( FIG. 2 ), are positioned with free ends 15 parallel, facing, and close together, and are welded—possibly in a number of weld passes at successive joining stations 11 —to form an annular weld bead 17 between pipes 3 ( FIG. 3 ).
  • two welded pipes 3 form a cutback 18 extending along axis A, between two successive bevels 16 of first coating 13 , and along annular weld bead 17 .
  • joining pipes 3 also comprises bridging first coating 13 and second coating 14 .
  • Bridging first coating 13 comprises surface treating (shot peening) cutback 18 ; induction heating cutback 18 to 250° C.; and applying a first coat 19 , second coat 20 , and third coat 21 of polymer material to cutback 18 in rapid succession.
  • first coat 19 is 100 to 500 microns thick, and is made of epoxy (FBE: Fusion Bonded Epoxy) resin applied to cutback 18 in powdered form using a spray gun not shown in the drawings.
  • FBE Fusion Bonded Epoxy
  • second coat 20 is 100 to 500 microns thick, and is made of a modified copolymer, normally CMPE or CMPP, applied in powdered form about cutback 18 , on top of first coat 19 , using a spray gun not shown in the drawings.
  • CMPE CMPE
  • CMPP CMPP
  • third coat 21 is 2 to 5 mm thick, is made of a modified copolymer, normally CMPE or CMPP, applied by winding a single protective sheet 22 of modified copolymer about cutback 18 at a joining station 11 , and is wide enough to overlap first coating 13 .
  • protective sheet 22 is extruded directly, close to cutback 18 , from a pasty copolymer, and is wound about cutback 18 . More specifically, protective sheet 22 is advantageously extruded and wound about cutback 18 simultaneously, and is extruded thick enough to bridge first coating 13 to its original thickness in only one pass.
  • third coat 21 also comprises pressing protective sheet on cutback 18 to achieve chemical and mechanical adhesion between third coat 21 and second coat 20 , and between third coat 21 and first coating 13 underneath.
  • protective sheet 22 is advantageously also pressed simultaneously as it is extruded and wound.
  • second coating 14 is bridged by applying a coat C of bitumen or resin, as shown in FIG. 7 .
  • vessel 1 comprises a pipe-joining apparatus 23 for joining pipes 3 , and which comprises three welding units S at respective joining stations 11 ; a coating unit 24 ( FIG. 8 ) for applying third coat 22 at a joining station 11 ; and a plastifying unit 25 ( FIG. 8 ) close to coating unit 24 .
  • coating unit 24 applies third coat 21 according to the method described, which preferably comprises simultaneously extruding, winding, and pressing protective sheet 22 about cutback 18 .
  • pipes 3 are supported and guided by rollers 26 , in turn supported by uprights 27 fixed to tunnel 5 .
  • uprights 27 may rest on outside ramp 6 ( FIG. 1 ).
  • Plastifying unit 25 plastifies the polymer, originally in the form of granules or flakes, is fixed to tunnel 5 by a structural member 28 , and comprises a hopper 29 , a screw extruder 30 , and a nozzle 31 .
  • Coating unit 24 comprises rails 32 fixed to tunnel 5 ; a carriage 33 running, parallel to axis A, along rails 32 ; a further rail 34 formed in carriage 32 ; and a wheel 35 supported on rail 34 and rotating about a respective axis A 1 substantially coinciding with axis A of underwater pipeline 2 .
  • Coating unit 24 comprises an extruder 36 and a roller 37 , both supported by wheel 35 .
  • Extruder 36 comprises an outlet 38 for forming protective sheet 22 , and an inlet 39 by which to feed the liquid or pasty polymer from plastifying unit 25 to coating unit 24 , and is positioned with outlet 38 facing and close to cutback 18 .
  • the distance between outlet 38 and second coat 20 generally equals the thickness of third coat 21 to be applied.
  • extruder 36 with respect to axis A 1 is adjustable by means of a powered device, not shown in the drawings, to adjust and obtain the best distance between outlet 38 and second coat 20 ; and extruder 36 can be tilted to adapt its position with respect to cutback 18 , in the event axis A 1 and axis A do not coincide perfectly.
  • Wheel 35 comprises two rings 40 spaced apart by spacers 41 equally spaced about axis A 1 ; and two opposite, facing plates 42 ( FIG. 9 ) for supporting extruder 36 .
  • extruder 36 is mounted to slide with respect to plates 42 and radially with respect to axis A 1 , and is selectively adjustable with respect to axis A 1 .
  • Roller 37 is supported by a member fixed adjustably to extruder 36 to adjust the position of roller 37 with respect to outlet 38 .
  • Member 43 comprises a spring 44 for exerting thrust on roller 37 when applying protective sheet 22 ; and roller 37 is preferably divided into a number of independent portions to effectively compress both the portion of protective sheet 22 on cutback 18 , and the portions of the protective sheet overlapping first coating 13 .
  • Extruder 36 comprises a tank 45 , which comes out inside outlet 38 and is filled through inlet 39 ; a piston 46 , which slides inside tank 45 ; a rod 47 fixed to piston 46 ; and an actuator 48 for moving rod 47 and piston 46 back and forth inside tank 45 , towards outlet when extruding protective sheet 22 , and in the opposite direction when extrusion is completed.
  • Coating unit 24 comprises an actuator 49 for rotating wheel 35 about axis A 1 ; and an actuator 50 for moving carriage 33 parallel to axis A, and so moving wheel 35 and extruder 36 along rails 32 to selectively set extruder 36 to a feed position (shown by the dash line in FIG. 8 ), in which nozzle 31 of plastifying unit 25 is connected to inlet 39 of the coating unit, and a coating position (shown by the continuous line in FIG. 8 ), in which outlet 38 is located in close proximity to cutback 18 .
  • Actuators 48 , 49 , 50 are preferably electromechanical, which are preferred to hydraulic or pneumatic actuators by not requiring piping which could impede the movement of coating unit 24 , and by powering the moving parts by means of sliding contacts not shown in the drawings.
  • Mechanically, actuators 48 , 49 , 50 may be defined by sprocket/rack, sprocket/gear, and screw/nut screw couplings.
  • tank 45 comprises lateral walls 51 ; end walls 52 ; and heating elements 53 for maintaining a temperature which enables extrusion of protective sheet 22 , and promotes adhesion of protective sheet 22 to second coat 20 .
  • outlet 38 is bounded by two plates 54 perpendicular to end walls 52 , and by two prismatic bodies 55 gripped between plates 54 , and so has a flow cross section 56 of height H defined by the distance between plates 54 , and of width L defined by the distance between prismatic bodies 55 .
  • Prismatic bodies 55 are gripped releasably between plates 54 , to adjust the distance between prismatic bodies 55 and the width L of flow cross section 56 .
  • the distance between end walls 52 may also be adjusted by inserting prismatic bodies 55 of a different thickness to adjust height H of flow cross section 56 . These adjustments provide for adjusting the thickness and width of protective sheet 22 to the size of cutback 18 .
  • the prismatic bodies are bevelled to form a protective sheet 22 with bevelled lateral edges.
  • pipe-joining apparatus comprises a control unit 57 for controlling the movement of underwater pipeline 2 with respect to joining stations 11 , the movements and operation of coating unit 24 , and operation of plastifying unit 25 . More specifically, control unit 57 coordinates the rotation speed Vr of wheel 35 , when applying protective sheet 22 , with the displacement speed Vp of piston 46 at the extrusion stage, wherein piston speed Vp is related to the extrusion speed of protective sheet 22 .
  • the ratio between wheel speed Vr and piston speed Vp (tantamount to the extrusion speed of protective sheet 22 ) must be such as to avoid “stretching” (rotation speed Vr too fast with respect to piston speed Vp) or “folding” (rotation speed Vr too slow with respect to piston speed Vp) protective sheet 22 as it is applied.
  • Stretching of protective sheet 22 may be useful at the final stage to detach protective sheet 22 from outlet 38 .
  • vessel 1 advances in steps to feed the free ends 15 of pipes 3 or cutbacks 18 into joining stations 11 , and stops when cutbacks 18 are located at joining stations 11 .
  • Pipe-joining apparatus 23 is located at the joining station 11 where third coat 21 is formed.
  • coating unit 24 is connected to polymer plastifying unit 25 as vessel 1 advances, and, when the vessel 1 stops, is located about a cutback 18 , to which first coat 19 and second coat 20 have been applied in known manner.
  • Piston 46 is moved forwards towards outlet 38 to expel the plastic polymer through outlet 38 and gradually form protective sheet 22 .
  • wheel 35 is rotated about axis A 1 , which, at joining station 11 , coincides with axis A of underwater pipeline 2 .
  • the displacement speed of piston 46 is synchronized with the rotation speed of wheel 35 to apply protective sheet 22 evenly as it is extruded.
  • protective sheet 22 or, rather, the portion of protective sheet 22 that has just come out of outlet 38 —is simultaneously compressed by roller 37 located close to and downstream from outlet 38 in the rotation direction of wheel 35 .
  • Wheel 35 and extruder 36 make one complete 360° turn, plus a further roughly 5° to overlap the opposite ends of protective sheet 22 .
  • extrusion may be cut off or slowed down to “stretch” protective sheet 22 and reduce the thickness of the overlap end to detach protective sheet 22 from outlet 38 .
  • the present invention has numerous advantages, one of which being the considerable time saved in producing third coat 21 —or, more generally speaking, a thick coat at ideal coating temperature—by simply extruding protective sheet 22 on site.
  • Another advantage lies in simultaneously extruding and winding protective sheet 22 onto cutback 18 . Moreover, protective sheet 22 is compressed simultaneously as it is extruded and wound; and the method and pipe-joining apparatus 23 described allow of numerous adjustments, which make the invention highly versatile.
  • pipe-joining apparatus 23 may be produced in a number of variations, in which:
  • a) plastifying unit 25 is movable to feed coating unit 24 , as opposed to coating unit 24 moving to and from the plastifying unit;
  • both coating unit 24 and plastifying unit 25 are fixed, and are connected by a pipe, not shown in the drawings, connectable selectively to coating unit 24 .
  • wheel 35 is supported for rotation by two jaws or belts connectable to underwater pipeline 2 , on opposite sides of cutback 18 .
  • apparatus 23 may obviously form part of an on-land installation for joining standard-length pipes 3 into multiple-standard-length pipes 3 , which are joined to form underwater pipelines 2 on a vessel for joining multiple-standard-length pipes 3 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Arc Welding In General (AREA)
US12/448,194 2006-12-14 2007-12-13 Pipe-joining method and apparatus for producing underwater pipelines, and underwater-pipeline-laying vessel comprising such an apparatus Expired - Fee Related US8061582B2 (en)

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ITMI2006A2402 2006-12-14
IT002402A ITMI20062402A1 (it) 2006-12-14 2006-12-14 Metodo e apparecchiatura di giunzione di spezzoni di tubo per realizzare tubazioni sottomarine e natante di posa di tubazioni sottomarine comprendente tale apparecchiatura
ITMI2006A002402 2006-12-14
PCT/EP2007/063903 WO2008071773A2 (en) 2006-12-14 2007-12-13 Pipe-joining method and apparatus for producing underwater pipelines, and underwater-pipeline-laying vessel comprising such an apparatus

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US13/302,200 Expired - Fee Related US8910852B2 (en) 2006-12-14 2011-11-22 Pipe-joining method and apparatus for producing underwater pipelines, and underwater-pipeline-laying vessel comprising such an apparatus
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US8910852B2 (en) * 2006-12-14 2014-12-16 Saipem S.P.A. Pipe-joining method and apparatus for producing underwater pipelines, and underwater-pipeline-laying vessel comprising such an apparatus
US20100147047A1 (en) * 2007-04-12 2010-06-17 Saipem S.A. Method of Making an Udersea Pipe, the Method Including Peening Assembly Welds Inside the Pipe
US20110107571A1 (en) * 2007-08-21 2011-05-12 Saipem S.A. Peening Device for Peening Welds Inside Steel Submarine Pipes, Process for Producing Steel Submarine Pipes Using Such a Device, and Submarine Connection Pipe
US10352494B2 (en) * 2014-03-28 2019-07-16 Public Joint Stock Company “Transneft” Method for thermally insulating welded joints of pre-insulated pipes
US11148218B2 (en) * 2016-03-10 2021-10-19 Hitachi Zosen Corporation Method for welding steel pipe in steel pipe structure and joint
US11446775B2 (en) * 2018-07-16 2022-09-20 William A. Schahuber Tank fabricating equipment
US11577348B2 (en) * 2018-07-16 2023-02-14 William A. Schahuber Tank fabricating equipment
US20230234174A1 (en) * 2018-07-16 2023-07-27 William A. Schahuber Tank fabricating equipment

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AU2007331508A1 (en) 2008-06-19
CN101631980B (zh) 2011-12-21
RU2454592C2 (ru) 2012-06-27
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EP2100068A2 (en) 2009-09-16
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US9441768B2 (en) 2016-09-13
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US20120145309A1 (en) 2012-06-14
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US20100065614A1 (en) 2010-03-18
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EP2535629B1 (en) 2015-08-05
EP2100068B1 (en) 2012-10-24
ITMI20062402A1 (it) 2008-06-15
MX2009006302A (es) 2009-12-15
WO2008071773A3 (en) 2008-09-18
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US8910852B2 (en) 2014-12-16
ES2395865T3 (es) 2013-02-15

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